Railway truck



c1. "TRAJILLA, JR

RAILWAY TRUCK Filed June 15, 1931 2 Sheets Sheet l I n we n for C/ames C. Fay/W4, c/x.

March 1935- J. c. TRAVILLA, JR 1,995,525

RAILWAY TRUCK Filed June 13, 1931 2 Sheets-Sheet 2 Patented Mar. 2 6 1 935 it v s f I un ts D: PATENT OFFICE g d 1,995,525 RAILWAY CK James'Q-"Iravilla, Jr., Philadelphia, Pa., assignor to General Steel Castings Corporation, Granite City; 111., a corporation of' Delaware AspneatienJune'm, 1931, Serial No. 544,184

23 Claims. (01.105-174) This invention relates to railway rollingstock gitudinal center line of the structureshown-in and consists in a novel locomotive underframe Figure 1. i v v V and leading truck of the radius. bar type, and Figure 3 is a-vertical transverse section -taken particularly the truck centering means. l in part on the line 3--3 of Figure 2, and in part Centering devices in locomotive leading trucks on a vertical plane extending through thetruckf 5;

are usually mounted on a truck transom member axle. y g and Support a swinging bolster, usually through Figure 4-is a detail vertical transverse section rockers. Rockers of various; shapes and sizes taken on the line 44 of Figure 2.

have been;developedfor this purpose which en- Figure 5 is'a detail horizontal section taken gage seats of suitabledesign secured to the tranon theline 5-5 of Figure 3. 10 som and thebolster. The front deck of the lo- The portion of the locomotive underframe comotive is provided with a center pin guide which shown includes side members, 1, a cylinder saddle rests uponthe truck bolster center plate, and a structure including smoke box saddle 2,,a box center 'pin is inserted through the guide and censhaped front deck structure 3, and apilot beam ter plate for maintaining the assembly. Lead- 4. Front drivers 5 mount the usual drivingboxes 1 ing trucks are frequently equalized with the driver (not shown), and driving box saddles 6 support springs by means of a substantially horizontal the driver springs '7. A transverse equalizer}; member which is suspended fromthe driver extends between the front pair of driver springs springs at one end and is carried by the truck 7 and at the middle mounts a hanger -9 which bolster at the other end. at its lower extremity supports the rear end of 2Q 1 hen the rockers function in this arrangement, equalizer 10. The equalizer is fulcrumed in a the bolster moves laterallyin. a direction perbracket 11 depending from the underframe bependicularitofthelongitudinal axis of the truck. neathsaddle 2. j

In' ordento permit the swiveling movement of The leading truck hasa pair of wheels 1; 2

must have some movement longitudinallyof the 14. The truck frame includes side members-l5 underframe. The maxiinum longitudinal moveand lfivpositioned outside and insidethe wheels V ment is not great and is usually cared for by 12,;respectively, and transoms 17 18; and 19; clearance between the truckbolster and th e frame Transom 19 is of inverted U-shaped section and. v wear plates and by slippage between the bolster partially encloses axle 20, and has a central spacer 3;) and rockers or rockers and transoInL 1 I and bolt-2l and 22. Radius bars '23- extend rear:

The main objects of the presentinvention are wardly from transom 18 and merge at their rear to simplify the construction of the IeadingtruckQ ends to receive a bushing 24 which is confined decrease the number of machine operations necbetween two plates 36- and 37, bolted to brackets essary, improve the truck appearance, and 'de- 25 on the underf-rame. A radiusbar pin 26 fits 35 crease the weight thereof; by materially decreas loosely within bushing 24 in order to permit'the ing the number of parts used in constructing the truck to move: longtiudinally during the swiveltruck; 7 ing of the truck, as will be hereafter explained.v .Another object isto locate the centering de- Inverted U-shaped truck transom19'has a conthe truck' about the radius bar pivot; thebolster mounting outside journal boxes 13 and springs vice above the truck in-such a position as to facave seat 27 secured to the top thereof which '49 cilitate inspection and lubrication. mounts 'a segmental rocker indicated generally Another objectis to lengthen the period of useat 28. Rocker 28 has a pair of teeth 29', which fulness of the centering device by eliminating slipfit into corresponding openings or recesses 30 in page between the rocker andsupporting transom. the concave surface of seat 27-, and depending 7 These objects and others are attained substanflanges 31,vwhich engage the sides of seat 2 7 and is tially by eliminating the swinging bolster and serve to guide the rocker. The teeth 2'9'p'revent supporting the front endof the driver and truckslippage fromoccurring between the rocker and T equalizer upon a rocker which is in turn mounted its seat 2'7. I 1' 2 upon a truck transom member. Rocker28 is composed of a convex lowerbeare In the drawings which illustrate the invening surface 51, from which teeth29 project, angled tion v I v v spaced sides 32 which have aligned openings in Figure lvis a. fragmentary top view of a 1000- their top ends provided with bushings 33 wer motive underframe and a portion of a leading ceiving acylindrical pin 34. Pin 34 also pivota-lly truck embodying the invention. mounts a loop hanger 35 which ispositionedbe- Figure 2 is a vertical section taken on the lon' tween the sides32=off the rocker andwhichsup-f55 ports the front end of equalizer 10. Lateral motion is transmitted to the centering device by means of spaced guides 39 having wearing plates 41, the guides being illustrated as formed integral with the transverse web 43 extending between the top and bottom webs of deck 3, and projecting downwardly through an opening 40 in the lower movement of the rocker relative to the under-v frame is provided for by the movement of the truck, itself, as permitted by the loose fitting of the radius bar pin within its bushing. Teeth 29 are added to the rocker to further obviate the possibility of slippage between rocker and seat and thus increase the life of the rocker which bears the load applied to the truck. The hanger will receive some Wear but may be easily replaced.

The number of truck parts in the novel device is considerably less than in the usual .types of two wheel leading trucks and, consequently, the weight of the truck and the amount of machining necessary is decreased, and its appearance is improved. Through more advantageous distribution of metal, the truck is of strength equal to or greater thanthose of previous design and is perfectly stable since the point of application of the load is the same as in previous trucks of similar type. In case of equalizer failure, the truck will continue to function as a front guide for the locomotive.

The only parts of the novel centering device requiring lubrication are the hanger pin and guides, and these may be readily reached at the same time from the top of the underframe deck through openings 42 and '40. Inspection is made easy because the device is located above the truck instead of between a truck bolster and transom.

Obviously, the invention is not limited to the details of the embodiment selected for the purposeof illustration and various modifications such as the substitution of a truck frame having inside journals or a frame arranged for four wheels instead of two, may be made without departing from the spirit thereof and I contemplate the exclusive use of all such modifications as come within the scope of myclaims.

'Iclaim:

1. A rocker for a truck centering-device comprising a lower bearing surface and a top load supporting bearing, there being a recess in said rocker extending below said bearing for accommodating a load supporting hanger pivotally supported from said bearing.

2. A centering device for a railway truck including a rocker having a lower bearing surface for'resting upon a truck frame member, a tooth depending from said surface for engagingjsaid member to prevent slippage, arid a substantially upright portion above said surface, and a hanger carried by said portion for supporting the rocker load.

3. A centering device for a railway'truck including a rocker having spaced side members, a curved bearing surface connecting the lower ends of said members, an element extending between and supported by said members near the tops thereof, and a hanger suspended from said element between said members for supporting the rocker load.

4. A centering device for a railway truck including a rocker having a lower bearing surface for resting upon a truck frame member, aflange depending on each side of said surface for engaging a rocker seat to guide said rocker, a tooth depending from said surface for engaging said member to prevent slippage, and a substantially upright portion above said surface, and a hanger carried by said portion for supporting the rocker load. a

'5. In combination, a locomotive truck including a transom member and a radius bar projecting substantially horizontally from said member, and a centering device resting on the upper surface of said member and including a rocker and a hanger carried thereby for supporting th rocker load.

6. Ina locomotive truck, a pair of wheels and an axle including journals, a frame supported on said journals andincluding a U-section transom partially enclosing said axle, a transverse bearing in said transom, and a centering device including a rocker supported on said bearing and a hanger pivotally supported by said rocker and adapted to support the rocker load.

I 7. In a locomotive truck, spaced journals, springs carried by said journals, a frame carried on said springs, radius bars projecting longitudinally from said frame, and a transverse bearing on said frame, and a centering device including a rocker mounted on said bearing and a hanger pivoted to said rocker for supporting the rocker load.

8. In a locomotive truck, spaced journals, a frame supported on said journals, and a transverse bearing in said frame, and a centering device including a rocker'supported on said bearing and a hanger carried by said rocker for supporting the end of an equalizer bar, said hanger being arranged, to pivot relative to said rocker inthe plane of movement of 'said rocker. '9. In combination, a locomotive underframe, a truck, a centering device including a rocker mounted on said truck and a load carrying member pivotally suspended on said rocker, and a guide elementon said underframe for engaging said member and transmitting lateral forces between said underframe and device.

10. A locomotive underframe including a box section front deck structure having top and bottom webs, there being an opening in said bottom web, and a pair of spaced guide elements depending through said opening for transmitting lateral forces between said underframe and a truck centering device.

11. A locomotive underframe including a box section front deck structure having top and bottom webs, and spaced guides depending from said structure for transmitting lateral forces between said underframe and a rocker centering device, said top web being shaped to permit access to said guides and the centering device for inspection and lubrication. q

12. In a locomotive underframe, a front deck member, a radius bar pin bracket and an equalizer fulcrum spaced from said member, and a plurality of spaced guides depending from said member for engaging a truck centering device and transmitting lateral forces between said un- "derframe and device.

truck including a transom and radius bars pivotally secured to said underframe, a centering device including a rocker rollable transversely of said truck on said transom, and an equalizer bar fulcrumed on said underframe andsupported at one end by said rocker.

14. In a locomotive, an underframe having spaced guides depending therefrom, a leading truck including a' transom and a radius bar pivotally secured to said underframe, a centering device including a rocker rollable transversely of said truck on said transom and a hanger pivotally mounted on said'rocker, and an equalizer bar fulcrumed on said underframe and supported at one end by said hanger, said guides engaging opposite sides of said hanger and serving to transmit lateral forces between said underframe and said centering device.

15. In a locomotive, an underframe havin spaced guides depending therefrom; a leading truck including a transom and a radius bar extending longitudinally thereof and including an end portion having an opening therein; a centering device including a rocker mounted to roll transversely of the truck on said transom and a hanger secured to said rocker, and swingable transversely of the truck and engaging said guides; an equalizer bar fulcrumed to said underframe and supported at one end by said hanger; and a radius bar pin fitting loosely Within said opening and pivotally connecting said radius bar to said underframe, said truck being movable longitudinally relative to said underframe during swiveling of the truck about said pin.

16. In combination, a truck centering device rocker comprising a lower bearing surface, and an upright portion having a recess above said surface, and a load supporting hanger suspended from said upright portion and projecting into said recess.

17. A centering device for a railway truck including a rocker having an upper bearing, a lower bearinglsurface for resting on the truck frame, and a hanger carried by said upper bearing and arranged for supporting the rocker load at a point below and in substantially vertical alinement with said upper bearing.

18. In a centering device for a railway truck, a rocker, and a hanger pivoted on said rocker and having a load engaging element located directly beneath the hanger pivot.

19. In a locomotive truck, a frame, a rocker seat member having inclined rocker supporting surfaces, a rocker having cylindrical surface contact with said member, a hanger pivotally supported by said rocker, and a load carrying equalizer supported by said hanger. I

20. In a locomotive, the combination of an underframe and a centering device including a rocker, and a guide element projecting downwardly from said underframe and engaging saidv rocker for transmitting lateral forces between said rocker and element, and said element providing for relative vertical movement between said rocker and element. a I

21. In a locomotive, the combination of an underframe and a centering device including a rocker having a lower bearing surface and an upper load carrying bearing, and a guide element on said underframe for said centering device for transmitting lateral forces between said underframe and device, said element projecting below said bearing.

22; A centering device for a railway truck including a rocker having a bearing for engaging the truck, and a load supporting element swingably carried directly by said rocker from a point located in substantially vertical alinement with the part of the rocker engaging the truck.

23. In a centering device for a railway truck, a

rocker, a hanger pivoted on said rocker and hav-' ing a load engaging. element located in substantially vertical alinement with the hanger pivot. JAS. C. TRAVILLA, JR. 

